3
INSTALLATION (cont’d.)
SPECIAL INSTRUCTIONS FOR CUSTOMERS SUPPLYING
THEIR OWN CONDENSATE OR PUMP SYSTEMS.
1. Check the voltage of the motor before making the wiring connec-
tion. Some Chromalox boilers are supplied with dual voltage sys-
tems. The motor should always match the voltage of the control
circuit.
2. The motor circuit should be wired into the pump control as shown
in wiring diagram.
3. A heavy-duty vacuum breaker is required when condensate system
is used. (part number ES-89369)
WIRING
1. Wiring to boiler should be as per appropriate wiring diagram sup-
plied with boiler and in accordance with Local and National
Electrical Codes.
2. SAFETY SWITCHES - Purchaser should use a safety switch
between his main power source and the boiler. The safety switch
should use circuit breakers or fuses and be in accordance with
NEC and local codes.
Serious thought should be given to the advisability of using a shunt
trip safety switch of the circuit breaker type as an additional safe-
ty precaution. It is possible to utilize the spare contacts in the low
water cutoff to energize the shunt mechanism on the safety switch.
This is an additional safety feature that prevents a dangerous situ-
ation should a contactor or relay stick. Activation of the shunt trip
device will completely disconnect the boiler from the power sup-
ply. (See Figure 7).
3. Since boiler heating elements are susceptible to lightning damage,
plants not having lightning arresters that have above-ground elec-
trical cable supply sources should install lightning arresters in the
proper size to meet the boiler kw load.
